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gbproxy: Test case for BVC flow control procedure 

Related: OS#4891
Change-Id: I6daa5848bd59b42f152de783bfdc602d1f2da861
changes/34/21634/1
Harald Welte 2020-12-09 15:10:55 +01:00
parent b9f0fdc177
commit 299aa48c64
1 changed files with 71 additions and 0 deletions
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71
gbproxy/GBProxy_Tests.ttcn
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@ -726,6 +726,7 @@ type component GlobalTest_CT extends test_CT {
port BSSGP_PT G_SGSN[NUM_SGSN];
};
/* connect the signaling BVC of each NSE to the G_PCU / G_SGSN ports */
private function f_global_init() runs on GlobalTest_CT {
var integer i;
for (i := 0; i < lengthof(g_sgsn); i := i+1) {
@ -736,6 +737,17 @@ private function f_global_init() runs on GlobalTest_CT {
}
}
/* connect the first PTP BVC of each NSE to the G_PCU / G_SGSN ports */
private function f_global_init_ptp() runs on GlobalTest_CT {
var integer i;
for (i := 0; i < lengthof(g_sgsn); i := i+1) {
connect(self:G_SGSN[i], g_sgsn[i].vc_BSSGP_BVC[0]:GLOBAL);
}
for (i := 0; i < lengthof(g_pcu); i := i+1) {
connect(self:G_PCU[i], g_pcu[i].vc_BSSGP_BVC[0]:GLOBAL);
}
}
/* Send 'tx' on PTP-BVCI from PCU; expect 'rx' on SGSN */
friend function f_global_pcu2sgsn(template (value) PDU_BSSGP tx, template (present) PDU_BSSGP exp_rx,
integer pcu_idx := 0, integer sgsn_idx := 0) runs on GlobalTest_CT {
@ -2324,6 +2336,64 @@ testcase TC_bvc_reset_sig_from_sgsn() runs on test_CT {
f_cleanup();
}
/***********************************************************************
* FLOW-CONTROL-BVC procedure
***********************************************************************/
private altstep as_g_count_sgsn(integer sgsn_idx, inout ro_integer roi,
template PDU_BSSGP exp_rx, template (omit) PDU_BSSGP tx_reply)
runs on GlobalTest_CT {
[] G_SGSN[sgsn_idx].receive(exp_rx) {
roi := roi & { sgsn_idx };
if (ispresent(tx_reply)) {
G_SGSN[sgsn_idx].send(tx_reply);
}
}
}
/* Send FC-BVC from simulated PCU; expect each SGSN to receive it; expect PCU to receive ACK */
testcase TC_fc_bvc() runs on GlobalTest_CT
{
f_init();
f_global_init_ptp();
var template (value) PDU_BSSGP pdu_tx := t_BVC_FC_BVC(10240, 2000, 1024, 1000, '01'O);
/* we cannot use pdu_tx as there are some subtle differences in the length field :/ */
var template (present) PDU_BSSGP pdu_rx := tr_BVC_FC_BVC(10240, 2000, 1024, 1000, '01'O);
var template (omit) PDU_BSSGP ack_tx :=
t_BVC_FC_BVC_ACK(pdu_tx.pDU_BSSGP_FLOW_CONTROL_BVC.tag.unstructured_Value);
/* Send a FC-BVC from BSS to gbproxy, expect an ACK in response */
G_PCU[0].send(pdu_tx);
/* Activate altsteps: One for each SGSN-side PTP BVC port */
var ro_default defaults := {};
for (var integer i := 0; i < lengthof(g_sgsn); i := i+1) {
var default d := activate(as_g_count_sgsn(i, g_roi, pdu_rx, ack_tx));
defaults := defaults & { d };
}
f_sleep(3.0);
for (var integer i := 0; i < lengthof(defaults); i := i+1) {
deactivate(defaults[i]);
}
/* check if BVC-block was received on all expected BVC */
for (var integer i := 0; i < lengthof(g_sgsn); i := i+1) {
if (not ro_integer_contains(g_roi, i)) {
setverdict(fail, "Missing BVC-FLOW-CONTROL on SGSN index ", i);
}
}
/* Expect ACK on PCU side */
G_PCU[0].receive(ack_tx);
setverdict(pass);
f_cleanup();
}
control {
execute( TC_BVC_bringup() );
execute( TC_ul_unitdata() );
@ -2385,6 +2455,7 @@ control {
execute( TC_flush_ll() );
execute( TC_fc_bvc() );
}